Searching for testers of a new much sharper color eink rainbow eraser algorithm.
Instead of a global blur, this takes into account the shape of the color filter array.
Just for convenience, links to the test builds with new rainbow algorithm:
https://github.com/axu2/kcc/releases/tag/v8.0.4-major
https://github.com/axu2/kcc/releases/tag/v8.0.4-minor
You probably want the major build unless you have kobo Libra colour.
If you test please tell us your device model and which build works for you.